Một chất điểm chuyển động trên trục Ox với phương trình chuyển động là: x = t2 - 10t + 5. Trong đó x tính bằng mét, t tính bằng giây. Vận tốc chất điểm lúc t = 3 s là

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!

snell's law

refractve index = sin incidence / sin refraction

answer///scientific method;

365.25 earth days are in the year of a light year